package com.nine.shop.utils;

import java.math.BigDecimal;

/**
 * @author by Shawsw
 * @date 2019/8/24 16:35
 * 精度计算BigDecimal封装类
 * 用于金钱等计算
 */
public class BigDecimalUtil {

    private BigDecimalUtil() {
    }

    public static BigDecimal add(double v1, double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.add(b2);
    }

    public static BigDecimal sub(double v1, double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.subtract(b2);
    }
    public static BigDecimal mul(double v1, double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        //四舍五入保留两位小数
        return b1.multiply(b2).setScale(2,BigDecimal.ROUND_HALF_UP);
    }

    public static BigDecimal div(double v1, double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        //四舍五入保留两位小数
        return b1.divide(b2,2,BigDecimal.ROUND_HALF_UP);
    }
}
